Detection device for open-loop test of three-phase fully-controlled rectifier bridge

Abstract

The utility model belongs to the technical field of excitation system detection, and particularly relates to an open-loop test detection device for a three-phase fully-controlled rectifier bridge, which comprises a test carriage, an oscillograph, an isolation transformer and a load resistor, the oscillograph, the isolation transformer and the load resistor are integrally mounted on the test carriage, and wheels are mounted at the bottom of the test carriage; the positive and negative electrode connecting wires of the test compartment are externally connected with the direct current side of the rectifier bridge, and internally connected to the experimental load resistor and the oscillograph; a main power line of the test compartment is connected with a plant maintenance power box; an anode power line of the test carriage is connected with a rectifier bridge anode; the isolation transformer is connected with a main power line of the test compartment and an anode power line of the test compartment. The oscillograph is connected with the output end of the isolation transformer and the DC input end of the test compartment and is used for visually displaying and recording the test AC / DC voltage waveform. According to the utility model, wiring required by a test can be conveniently completed, a test waveform can be displayed, and the whole device is movable.

Description

Technical Field

[0001] The utility model belongs to the technical field of excitation system detection, and in particular relates to an open-loop test detection device for a three-phase fully controlled rectifier bridge. Background Art

[0002] The excitation system equipment used by the Sanmen Nuclear Power Plant is crucial for on-site power generation. The safety and reliability of the excitation equipment must be ensured during long-term operation and maintenance. The open-loop low-current test is the most important static test of the excitation system. Previous experiments often required numerous instruments. Even with all the necessary experimental equipment, assembling the instruments was time-consuming. Wiring was also complex, with test components and wiring exposed and messy, resulting in a low safety factor. The oscilloscope also required separate installation and additional wiring, impacting the progress and results of the test. Furthermore, previous testing equipment could not be moved quickly and easily during the test, making it unsuitable for complex on-site environments. Utility Model Content

[0003] The purpose of the utility model is to provide a three-phase fully controlled rectifier bridge open-loop test detection device, which can be used to detect the pulse output circuit wiring, the range of the control angle, the full-controlled bridge trigger circuit and the main circuit working condition of the excitation system, and can conveniently complete the wiring required for the test and display the test waveform. The device is movable as a whole to meet the requirements of multiple units on site.

[0004] Technical solution to achieve the purpose of this utility model:

[0005] A detection device for an open-loop test of a three-phase fully-controlled rectifier bridge comprises: a test carriage, an oscilloscope, an isolation transformer, and a load resistor, wherein the oscilloscope, the isolation transformer, and the load resistor are integrally mounted on the test carriage, and wheels are mounted on the bottom of the test carriage; the positive and negative connecting wires of the test carriage are externally connected to the DC side of the rectifier bridge, and internally connected to the experimental load resistor and the oscilloscope; the main power line of the test carriage is connected to the factory maintenance power box; the anode power line of the test carriage is connected to the anode of the rectifier bridge; the isolation transformer is respectively connected to the main power line of the test carriage and the anode power line of the test carriage; the oscilloscope is connected to the output end of the isolation transformer and the DC input end of the test carriage, and is used to visually display and record the test AC and DC voltage waveforms, and to display and save the test results.

[0006] The device further comprises a power control panel which is mounted on the test carriage.

[0007] The power control panel comprises a power input total switch, an anode power switch and an oscillograph power switch; the power input total switch is connected with the total power line of the test compartment; the anode power switch is connected with the anode power line of the test compartment, and the isolated transformer is powered on after the anode power switch is turned on, and the isolated transformer outputs anode power to the rectifier bridge.

[0008] The power control panel further comprises a maintenance socket, and the maintenance socket is powered by the total power line of the test compartment.

[0009] The power control panel further comprises a maintenance power switch, and the maintenance power switch is connected with the maintenance socket, and the lower row of maintenance sockets is powered on after the maintenance power switch is turned on.

[0010] The positive and negative electrode connecting line of the test compartment is connected with the rectifier bridge through the rectifier bridge output voltage access winch.

[0011] The anode power line of the test compartment is connected with the rectifier bridge through the isolated variable output winch.

[0012] The total power line of the test compartment is connected with the plant maintenance power supply box through the total AC power line winch.

[0013] The device further comprises a grounding row, which is installed at the bottom of the test compartment, and the grounding row is connected with the test compartment through the grounding line.

[0014] The beneficial technical effects of the utility model lie in:

[0015] The device for open-loop test and detection of three-phase full-control rectifier bridge provided by the utility model can realize safe and reliable test conditions, reduce the risk of miswiring and electric shock in the test process, and realize the mobility of the overall test device, thereby increasing the on-site use convenience and safety. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The device for open-loop test and detection of three-phase full-control rectifier bridge provided by the utility model can realize safe and reliable test conditions, reduce the risk of miswiring and electric shock in the test process, and realize the mobility of the overall test device, thereby increasing the on-site use convenience and safety.

[0017] In the figure: 1 - oscillograph; 2 - rectifier bridge output voltage access winch; 3 - grounding row; 4 - isolated variable output winch; 5 - isolated transformer; 6 - load resistor; 7 - power control panel; 8 - total AC power line winch. DETAILED DESCRIPTION

[0018] The utility model will be further described in detail in combination with the drawings and examples.

[0019] As Figure 1As shown, the utility model provides a kind of for three-phase full-control rectifier bridge open loop test detection device, comprising: test car, wave recorder 1, rectifier bridge output voltage access winch 2, ground row 3, isolation variable output winch 4, isolation transformer 5, load resistance 6, power control panel 7, total ac power cord winch 8.Wave recorder 1, rectifier bridge output voltage access winch 2, ground row 3, isolation variable output winch 4, isolation transformer 5, load resistance 6, power control panel 7, total ac power cord winch 8 are integrated on test car.The test car is steel trolley, and the test car bottom is provided with wheel.

[0020] The positive and negative electrode connecting line of test car is connected with rectifier bridge DC side outside, and is connected to experimental load resistance 6 and wave recorder 1 inside.Red line connects rectifier bridge positive pole, and black line connects rectifier bridge negative pole.

[0021] Preferably, the positive and negative electrode connecting line can be directly connected with rectifier bridge DC side by rectifier bridge output voltage access winch 2, and can be connected to rectifier bridge DC side by terminal row on cabinet door.

[0022] The total power cord of test car is connected with 380V maintenance power supply box of workshop, and test car is powered by 380V maintenance power supply box.Preferably, the total power cord of test car is connected with 380V maintenance power supply box of workshop by total ac power cord winch 8.

[0023] The anode power cord of test car is connected with rectifier bridge anode.Preferably, the anode power cord of test car can be connected with rectifier bridge anode by isolation variable output winch 4, and can be connected to rectifier bridge anode by terminal row on cabinet door.

[0024] Isolation transformer 5 is connected with total power cord of test car and anode power cord of test car respectively.

[0025] Wave recorder 1 is connected with isolation transformer 5 output end and test car DC input end, for visually displaying and recording test ac and DC voltage waveform, and showing and saving test result.

[0026] Ground row 3 is installed on the bottom of test car, and small current test car is reliably grounded by ground line through ground row 3.Preferably, ground row 3 is copper ground row, and the cross-sectional area of ground line is not less than 4mm 2 .

[0027] Power control panel 7 includes power air switch and maintenance socket, and the upper row is 4 power air switches, and the lower row is 4 maintenance sockets.4 power air switches include: AC380V power input master switch Q1, anode power switch Q2, AC220 maintenance power switch Q3, oscilloscope power switch Q4.Maintenance socket power is provided by total power cord of test car.

[0028] The power input total switch Q1 is connected with the total power line of the test compartment; the anode power switch Q2 is connected with the anode power line of the test compartment, and the anode power switch Q2 is connected with the isolation transformer 5, and the isolation transformer 5 outputs the anode power to the rectifier bridge; the maintenance power switch Q3 is connected with the maintenance socket, and the maintenance power switch Q3 is connected with the lower row of maintenance sockets.

[0029] When the detection device is detected, the 380V alternating current power is connected to the test compartment, the test compartment can provide the alternating current power for the equipment to be tested, and the wave recorder 1 with the touch function can be used to detect the rectified wave of the equipment.

[0030] The utility model has been explained in detail in combination with the drawings and the embodiment, but the utility model is not limited to the above-mentioned embodiment, and various changes can be made within the knowledge range of the ordinary skill in the art without departing from the purpose of the utility model. The contents not described in detail in the utility model can adopt the prior art.

Claims

1. A three-phase fully controlled rectifier bridge open-loop test detection device, characterized in that: The device comprises: a test carriage, a recorder (1), an isolation transformer (5), and a load resistor (6); the recorder (1), the isolation transformer (5), and the load resistor (6) are integrated and installed on the test carriage, and wheels are installed at the bottom of the test carriage; the positive and negative pole connection lines of the test carriage are externally connected to the DC side of the rectifier bridge, and internally connected to the experimental load resistor (6) and the recorder (1); the main power line of the test carriage is connected to the factory maintenance power box; the anode power line of the test carriage is connected to the anode of the rectifier bridge; the isolation transformer (5) is respectively connected to the main power line of the test carriage and the anode power line of the test carriage; the recorder (1) is connected to the output end of the isolation transformer (5) and the DC input end of the test carriage, and is used to visually display and record the test AC and DC voltage waveforms, and to display and save the test results.

2. The open-loop test detection device for a three-phase fully controlled rectifier bridge according to claim 1, characterized in that: The device further comprises a power control panel (7), which is mounted on the test carriage.

3. The open-loop test detection device for a three-phase fully controlled rectifier bridge according to claim 2, characterized in that: The power control panel (7) comprises a main power input switch (Q1), an anode power switch (Q2), and a recorder power switch (Q4); the main power input switch (Q1) is connected to the main power line of the test compartment; the anode power switch (Q2) is connected to the anode power line of the test compartment; when the anode power switch (Q2) is closed, the isolation transformer (5) is energized, and the output side of the isolation transformer (5) provides anode power to the rectifier bridge; the recorder power switch (Q4) is connected to the recorder (1).

4. The open-loop test detection device for a three-phase fully controlled rectifier bridge according to claim 2, characterized in that: The power control panel (7) further comprises a maintenance socket, the power supply of which is provided by the main power line of the test compartment.

5. The open-loop test detection device for a three-phase fully controlled rectifier bridge according to claim 4, characterized in that: The power control panel (7) further comprises a maintenance power switch (Q3), which is connected to the maintenance sockets. When the maintenance power switch (Q3) is turned on, the lower row of maintenance sockets are powered.

6. The open-loop test detection device for a three-phase fully controlled rectifier bridge according to claim 1, characterized in that: The positive and negative pole connection lines of the test carriage are connected to the winch (2) through the output voltage of the rectifier bridge and are directly connected to the DC side of the rectifier bridge.

7. The open-loop test detection device for a three-phase fully controlled rectifier bridge according to claim 1, characterized in that: The anode power line of the test carriage is connected to the anode of the rectifier bridge via an isolation transformer output winch (4).

8. The open-loop test detection device for a three-phase fully controlled rectifier bridge according to claim 1, characterized in that: The main power line of the test carriage is connected to the factory maintenance power box through a main AC power line winch (8).

9. The open-loop test detection device for a three-phase fully controlled rectifier bridge according to claim 1, characterized in that: The device further comprises a grounding bar (3), which is installed at the bottom of the test carriage, and the grounding bar (3) grounds the test carriage via a grounding wire.

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